Re: Template Nodes considered harmful

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On Friday 26 October 2007, David Lutterkort wrote:
> On Wed, 2007-10-24 at 12:20 -0500, Luke Kanies wrote:
> > > (20:16:21) sheeri: certainly I can see the need for something being
> > > both
> > > a "webserver" and a "dbserver".......which I'd think multiple
> > > inheritance
> > > would be the way to go
> >
> > Inheritance only makes sense when you're talking about one class
> > needing to modify another class, which is generally not the case.
>
> The point of the above (or at list the pointy end I've run into) is that
> you may want to create a class 'fooserver' by combining 'webserver' and
> 'dbserver', and give people the opportunity to modify resources coming
> from either. That's not possible with single inheritance.

The following is legal and will work as one could expect:


class fooserver {
  include webserver
  include dbserver
}

class webserver::without_frills {
  Frills["web2.0"] { ensure => absent } 
}

node 'nofrills.org' {
  include fooserver
  include webserver::without_frills
}


Regards, David
- -- 
The primary freedom of open source is not the freedom from cost, but the free-
dom to shape software to do what you want. This freedom is /never/ exercised
without cost, but is available /at all/ only by accepting the very different
costs associated with open source, costs not in money, but in time and effort.
- -- http://www.schierer.org/~luke/log/20070710-1129/on-forks-and-forking
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